React 19 for usas

[nick-torres]

High level description:

depends on fedspendingtransparency/data-transparency-ui#221

Technical details:

i had to change the hot reloading because react-hot-loader is aging off and the newest versions of webpack have it built in we just had to turn it on

JIRA Ticket:
DEV-1234

The following are ALL required for the PR to be merged:

Author:

• Linked to this PR in JIRA ticket
• Scheduled demo including Design/Testing/Front-end OR Provided instructions for testing in JIRA and PR if applicable
• Verified cross-browser compatibility: Chrome, Safari, Firefox, Edge
• Verified mobile/tablet/desktop/monitor responsiveness
• Verified that this PR does not create any new accessibility issues (via Axe Chrome extension)
• Added Unit Tests for helper functions, reducers, models and Container/Component Interactivity Expectations if applicable React Testing Library
• API contract updated if applicable
• Component Library Integration Status Report updated if applicable

Reviewer(s):

• Design review complete if applicable
• API #1234 merged concurrently if applicable
• Code review complete